HomeMy WebLinkAboutCT 13-05; STATE STREET TOWNHOMES; STORM WATER MANAGEMENT PLAN; 2014-10-23STORM WATER MANAGEMENT PLAN
14-12
FOR
STATE STREET TOWNHOMES
(C.T. 13-05, DRAWING NO.484-2SW)
October 23, 2014
ESS
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W ne W. Chang, MS, 46548
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Civil Engineering Hydrology Hydraulics Sedimentaon
P.O. Box 9496
Rancho Santa Fe, CA 92067
(858) 692-0760
-TABLE OF CONTENTS
1.0 Introduction ........................... ............................ .................................................................1
11 Vicinity Map 2
:1.2 Project Description 2
13 Site Map 3
1.4 Constraints and Opportunities 3
2.0 Water Quality Environment ....................................... ................................................... .. ........ 4
2.1 Beneficial Uses .................................................................................................................4
2.1.1 Inland Surface Waters ...................................................................................................... ..5
2.1.2 Groundwater .....................................................................................................................5
3.0 Pollutants and Conditions of Concern 5
3.1 Pollutants from Project Area .............................................................................. ................ ...5
3.2 Pollutants of Concern in Receiving Waters 6
4.0 Permanent Storm Water Best Management Practices 6
4.1 Standard Site Design BMPs ............................................................................................... 7
4.2 Source Control BIVIPs .......................................................................................................7
4.3 Low Impact Development Site Design BMPs 9
4.4 Treatment Control BMPs. ................................................................................................... .10
4.5 Hydromodification .............. .................... ............................. ............................................ 11
5.0 Storm Water BMP Maintenance .................................. .................................................... .11
,6 .0 Summary/Conclusions 13
7.0 Certification 13
Storm Water Standards Questionnaire, E-34
2011 303(d) List
APPENDIX i
A Treatment Control BMP Analyses and BMP Data Sheets
MAP POCKET
Single-Sheet BMP Plan
1.0 INTRODUCTION
This Storm Water Management Plan (SWMP) addresses water quality requirements associated
with final engineering of the State Street Townhomes project (Tentative Tract Map CT 13-05
and Major Review Permit RP.13-15) in the city of Carlsbad. The 1.89 acre site is located at 2531
to 2601 State Street and is currently developed with commercial and light-industrial uses. All of
the existing structures will be demolished to allow for construction of 47 two and three-story air
space townhomes including 41 live/work units and 6 inclusionary units.
RBF Consulting prepared the approved February 2014, State Street Townhomes Preliminary
Storm Water Management Plan (Priority Project), Carlsbad, San Diego County, California
(Preliminary SWMP), for the tentative tract map. The Preliminary SWMP determined that the.
project is not subject to hydromodification because it "is tributary to an existing City storm drain
that discharges directly to Buena Vista Lagoon approximately 350 feet downstream of the
Project Site." In addition, State Street conveys a small amount of storm runoff from the site
directly to the lagoon. The Preliminary SWMP proposed individual flow-through planters as
treatment control best management practices (BMPs) for several of the residential units and
additional proprietary/bioretention treatment control BMPs for the remainder of the site.
This SWMP accompanies the final engineering plans by the project's current civil engineer,
Adams-Streeter Civil Engineers, Inc., (Adams-Streeter) and follows the criteria outlined in the
City of Carlsbad's January 14, 2011, Standard Urban Storm Water Management Plan (SUSMP).
The final engineering maintains substantial conformance with the Preliminary SWMP by
proposing individual flow-through planters for several units as well as two proprietary devices
for the majority of the site.
According to the City's Storm Water Standards Questionnaire E-34 (attached following this
report text), the current development is in the following three priority project categories: Housing
subdivisions of 10 or more dwelling units; Streets, roads, highways, and freeways; and More
than 1-acre of disturbance. The SUSMP outlines the SWMP objectives, which are to identify site
opportunities and constraints, identify pollutants and conditions of concern, follow low impact
development design objectives, describe best management practices (BMPs), and outline
maintenance requirements. BMPs will be utilized to the maximum extent practicable to provide a
long-term solution for addressing runoff water quality. The BMP concepts were selected and
approved during the entitlement process (aka, with the Tentative . Tract Map) to meet the
objectives, and are being met during final engineering
I
1.1 Vicinity Map
SITE
PACIFIC
I OCEAN
Yd r
' NOT TO
SCALE
VICINITY MAP
1.2 Project Description
This Storm Water Management Plan was prepared to support final engineering for the State
Street Townhomes project. The project is located along the west side of State Street (at 2531 to.
2601 State Street) just south of Laguna Drive. The site currently encompasses 1.89 acres of
commercial/light-industrial development spread across five adjacent parcels (Assessor's Parcel
Number's 155-200-07 as well as 203-054-19, 20, 21, and 22). The existing development will be
demolished and converted into high-density residential development with 47 townhomes, and
associated drive aisles, parking, and common areas.
Under pre-project conditions, the site is fully-developed with multiple buildings, parking areas,
and drive aisles, and generally drains from northeast to southwest at a slope varying from 2 to
over 10 percent. According to the November 2013, 2531-2589 State Street Preliminary
Hydrology Report, by RBF Consulting, the existing site runoff sheet flows onto the adjacent San
Diego Northern Railroad property and City of Carlsbad public alley to the west. Runoff in the
rail property flows along the tracks and towards Buena Vista Lagoon. Runoff within the alley
flows to the alley's cul-de-sac and enters a grated catch basin that connects to an existing 66-inch
I
RCP storm drain that bisects the site. The existing 66-inch storm drain ultimate discharges to the
lagoon. There are no existing stormwater BMPs serving the site.
Under post-project conditions, a series of proposed drainage systems (underground storm drains,
catch basins, inlets, swales, curbs, gutters, and drive aisles) will be constructed to serve the site.
Each of the systems connects to the existing 66-inch RCP that is aligned west to east through the
middle of the site. The proposed systems are as follows.
Private storm drains will collect storm runoff from individual flow-through planters serving the
residential units along State Street. A portion of each unit's roof runoff will be directed into the
unit's flow-through planter by downspouts. All of the flow-through planters adjacent to State
Street along the southerly half of the site (serving units 10 through 17) will connect to a storm
drain that conveys runoff north to the existing 66-inch RCP. Similarly, the flow-through planters
adjacent to State Street along the northerly half of the site (serving Units 1 through 9) will
connect to a storm drain that conveys runoff south to the existing 66-inch RCP. A small portion
of the townhome roof runoff along State Street will not enter a flow-through planter. The runoff
from these areas will be treated by permeable payers between the State Street sidewalk and each
front door.
Another series of flow-through planters will serve Units 24 though 30 along the southerly portion
of the site next to the existing City alley. These flow-through planters will connect to a south-
north storm drain along the westerly portion of the site that ties into the 66-inch RCP. This.south-
north storm drain will also serve the remainder of the southerly half of the site. Runoff from the
remainder area will be treated by a Bio Clean Environmental Services, Inc. (Bio Clean) Curb
Inlet Basket before entering the storm drain.
Finally, a Bio Clean Water Polisher will serve the remainder of the northerly half of the site.
Runoff from this area will ultimately enter a private storm drain that connects to the Water
Polisher just before entering the 66-inch RCP. .
In addition to the flow-through planters, Curb Inlet Basket, and Water Polisher, permeable
payers will be used throughout the drive aisles and in portions of the walkways.
1.3 Site Map
A Single Sheet BMP Plan containing the Site Map is included in the map pocket.
1.4 Constraints and Opportunities
The development will replace an existing commercial/light-industrial site served by no BMPs.
The tentative tract map approval has determined that the project is exempt from
hydromodification and established a series of treatment control BMPs that can be implemented
and privately maintained. The final engineering design incorporates flow-through planters,
permeable payers, and proprietary devices as outlined during the entitlement process. The
architectural and grading design varies somewhat from entitlements (however, the site plan is
similar), so the treatment control BMPs have been adjusted accordingly.
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2.0 WATER QUALITY ENVIRONMENT
2.1 Beneficial Uses
The beneficial uses for the hydrologic unit (see Section 3.1) are included in Tables 1 and 2.
These tables were Obtained from the Water Quality Control Plan for the San Diego Basin (9)
compiled on August 28, 2012. The following contains definitions of the beneficial uses in the
tables:
MUN - Municipal and Domestic Supply: Includes uses of water for community,
military, or individual water supply systems including, but not limited to, drinking water
supply.
AGR - Agricultural Supply: Includes uses of water for farming, horticulture, or
ranching including, but not limited to, irrigation, stock watering, or support of vegetation
for range grazing.
IND - Industrial: Includes uses of water for industrial activities that do not depend
primarily on water quality including, but not limited to, mining, cooling water supply,
hydraulic conveyance, gravel washing, fire protection, or oil well re-pressurization.
REd - Contact Recreation: Includes uses of water for recreational activities involving
body contact with water, where ingestion of water is reasonably possible. These uses
include, but are not limited to, swimming, wading, water-skiing, skin and SCUBA diving,
surfing, white water activities, fishing, or use of natural hot springs.
REC2 - Non-Contact Recreation: Includes the uses of water for recreational involving
proximity to water, but not normally involving body contact with water, where ingestion
of water is reasonably possible. These uses include, but are.not limited to, picnicking,
sunbathing, hiking, camping, boating, tide pool and marine life study, hunting,
sightseeing, or aesthetic enjoyment in conjunction with the above activities.
WARM - Warm Freshwater Habitat: Includes uses of water that support warm water
ecosystems including, but not limited to, preservation or enhancement of aquatic habitats,
vegetation, fish or wildlife, including invertebrates.
WILD - Wildlife Habitat: Includes uses of water that support terrestrial ecosystems
including, but not limited to, preservation and enhancement of terrestrial habitats,
vegetation, Wildlife, (e.g., mammals, birds, reptiles, amphibians, invertebrates), or
wildlife water and food sources.
RARE - Rare: Bodies of water where the protection of a threatened or endangered
species depends on the water either directly, or to support its habitat.
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2.1.1 Inland Surface Waters
Inland surface waters for the Buena Vista Creek Hydrologic Area (see Section 3.1) have the.
beneficial uses shown in Table 1
H Table 1. Beneficial Uses for Inland Surface Waters
Hydrologic
Unit
Code n0 04 P4 iiU P4I __I
+ Exempted by the Regional Board from the municipal used designation.
Existing Beneficial Use
2.1.2 Groundwater
Groundwater beneficial uses for the El Salto Hydrologic Subrea are shown in Table 2:
Table 2. Beneficial Uses for Groundwater
Hydrologic
Unit
Code
J) -
0 -
1. (
904.21 • • 0
Existing Beneficial Use
o Potential Beneficial Use
3.0 POLLUTANTS AND CONDITIONS OF CONCERN
3.1 Pollutants from Project Area
The project is located within the El Salto Hydrologic Subarea (904.21) of the Buena Vista Creek
Hydrologic Area (904.20), which is within the Carlsbad Hydrologic Unit (904.00). The total
drainage area of the hydrologic unit is approximately 210 square miles. Runoff from the
hydrologic area ultimately drains to Buena Vista Creek and Buena Vista Lagoon, which is just
north of the site. All of the project runoff will enter Buena Vista Lagoon. The project site
represents less than one percent of the Buena Vista Creek watershed.
Table 3 lists pollutants of concern that are anticipated or can potentially exist at proposed priority
development project sites. The pollutants are from the city of Carlsbad's SUSMIP. The project
falls within the attached residential development and streets, highways & freeways priority
project categories (highlighted yellow in the table). All of the listed pollutants are anticipated
except for oxygen demanding substances, which can potentially exist at the developed site.
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Table 3. Priority Project Pollutants
Priority Heavy Organic Trash Oxygen Oil Bacteria
Project Sediments Nutrients Metals Compounds & Demanding & & Pesticides
Categories Debris Substances Crease Viruses
Detached
Residential X X X X X X X
Development
attached
esidentii x x x p() p(2) p x
Development
Commercial
Development p(I) p() x p(2) x p(S) x p(3) p(5)
> one acre
Heavy
Industry
Automotive x x x Repair Shops
Restaurants x x x x p(I)
Hillside
Development X X X X X X
>5,000 ft'
Parking Lots p( p(') x x p(') x p(i)
Retail X X X X X
Gasoline
Outlets
Streetsl
Highways &7 x x x x p(5) x x p(')
freeways,
A = tnucipatea
P = Potential
A potential pollutant if landscaping exists on-site
A potential pollutant if the project includes uncovered parking areas
A potential pollutant if land use involves food or animal waste products
Including petroleum hydrocarbons
Including solvents
3.2 Pollutants of Concern in Receiving Waters
The receiving water for the site is Buena Vista Lagoon. According to the October 11, 2011
303(d) list approved by the USEPA, Buena Vista Lagoon is 303(d) listed for indicator bacteria
and nutrients. The upper portion of the lagoon is also listed for sedimentation/siltation, but
project does not discharge to the upper portion. Buena Vista Lagoon is identified with total
maximum daily loads (TMDLs) that are required, "but not yet completed." Based on this
information, the project generates pollutants of concern in the receiving water for nutrients and
bacteria & viruses.
4.0 PERMANENT STORM WATER BEST MANAGEMENT PRACTICES :
To address water quality for the project, best management practices (BMPs) will be
implemented. The following discusses the Standard Site Design, Source Control, and Low
Impact Development design BMPs for the project. . .
4.1 Standard Site Design BMPs
The City of Carlsbad's standard objectives are required for all projects. The project will
accomplish these goals through the following standard site design BMPs, which are from the
Carlsbad SUSMP:
Standard Stormwater Requirements
Minimize Impervious Surfaces. The project will include pervious surfaces through landscaping
within the development area and extensive use of permeable payers throughout the drive aisles
and walkways. The pre-developed site contains minimal pervious surfaces, so the development
will provide significant benefits for this standard stormwater requirement.
Disconnect Discharges. Roof drains will discharge towards adjacent landscape areas (including
flow-through planters) and permeable payers in most, if not all, locations.
Conserve Natural Areas. The pre-project site condition was fully-developed with no natural
areas.
Stenciling Inlets and Signage. The catch basins and inlets within the project will be stenciled
with prohibitive language such as "No Dumping - I live downstream" or approved similar.
Landscape Design. A landscape plan will be prepared that uses drought-tolerant species in
accordance with the City's landscape manual. The project will only use water as needed to
support the landscaping.
Water Efficient Irrigation. The irrigation systems will be designed to each landscaped areas
water requirements to avoid over irrigation. Rain shutoff devices will be used to prevent
irrigation after rain events.
Protect Slopes And Channels. The project contains no significant slopes and no channels.
Vegetate slopes with native or drought tolerant vegetation. Native and drought-tolerant
vegetation will be used in proposed landscape areas to the extent feasible.
Trash Receptacles. Each unit will have private trash bins to be stored in the garage. These bins
will have lids, and only be outside of the garage on trash pickup days. Common areas will have
trash receptacles, and will be equipped with lids that prevent contact with rainfall.
Material Storage Areas.' The project does not propose outdoor material storage areas. Any
required material storage shall be kept under cover.
4.2 Source Control BMPs
Source control BMPs will consist of measures to prevent polluted runoff. The following
addresses the source control BMPs from Appendix 1 of the Carlsbad SUSMP:
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Table 4. Pollutant Sources and Source Control Checklist
Potential Source Permanent Source Operational Source
of Runoff Pollutants Control BMPs Control BMPs
On-site storm drain Mark all inlets with "No Maintain and periodically
inlets Dumping - I live downstream" repaint inlet markings
Provide stormwater pollution
information to owners, lessees,
and operators (Fact sheet SC-
44 from the CASQA
Stormwater Quality Handbook
at www.cabmphandbooks.com)
Owner/lessee agreements shall
state "Tenant shall not allow
anyone to discharge anything to
storm drains or to store or
deposit materials so as to create
a potential discharge to storm
drains.
Need for future Buildings shall be designed to Integrated Pest Management (e.g.,
indoor & structural avoid openings that would the EPA's Citizen Guide to Pest
pest control = encourage entry of pests. Control and Pesticide Safety)
information shall be provided to
owners, lessees, and operators.
Landscape/Outdoor Final landscape plans will Maintain landscaping using
Pesticide Use accomplish all of the minimum or no pesticides.
following. See applicable operational BMPs
Preserve existing native trees, in Fact Sheet SC-41, 'Building and
Grounds Maintenance," and TC- shrubs, and ground cover to 30, "Vegetated Swale," in the the maximum extent possible. CASQA Stormwater Quality
Handbooks at Design landscaping to www.cabmphandbooks.com
minimize irrigation and
runoff, to promote surface Integrated Pest Management (e.g.,
infiltration where the s Citizen's Guide to Pest
appropriate and to minimize Control and Pesticide Safety)
the use of fertilizers and information shall be provided to
owners, lessees, and operators. pesticides that can contribute
to stormwater pollution.
Where landscaped areas can
retain or detain stormwater,
specify plants that are
tolerant of saturated soil
conditions.
8
Consider using pest-resistant
plants, especially adjacent to
hardscape.
To ensure successful
establishment, select plants
appropriate to site soils,
slopes, climate, sun, wind,
rain, land use, air movement,
ecological consistency, and
plant interactions
Vehicle and The CC&Rs will define car
equipment cleaning washing requirements and
restrictions at the site. The
HOA will be responsible for
enforcing the requirements and
restrictions.
Vehicle/Equipment The CC&Rs will prohibit
Repair and repair and maintenance
Maintenance activities in areas exposed to
precipitation and storm flows.
The HOA will be responsible
for enforcing this requirement.
Roofing, gutters, and The architectural design will
trim avoid roofing, gutters, and trim
made of copper or other
unprotected metals that may
leach into runoff.
Plazas, sidewalks, Plazas, sidewalks, and parking lots
and parking lots, shall be swept regularly to prevent
the accumulation of litter and
debris Debris from pressure
washing shall be collected to
prevent entry into the storm drain
system. Wash water containing
any cleaning agent or degreaser
shall be collected and discharged
to the sanitary sewer and not
discharged to a storm drain.
4.3
Low Impact Development Site Design BMPs
Low Impact Development (LID) BMPs must be incorporated into the site design to meet the City
of Carlsbad's January 14, 2011 SUSMP requirements. The integrated LID outlines five
strategies
Q
r
Optimize the site layout by preserving natural drainage features and designing buildings
and circulation to minimize the amount of roofs and paving.
Use pervious surfaces such as turf, gravel, or pervious pavement—or use surfaces that
retain rainfall. All drainage from these surfaces is considered to be "self-retained".
I Disperse runoff from impervious surfaces on to adjacent pervious surfaces (e.g., direct a
roof downspout to disperse runoff onto a lawn).
4. Drain impervious surfaces to engineered Integrated Management Practices (IMPs), such
as bioretention facilities. IMPs infiltrate runoff to groundwater and/or percolate runoff
through engineered soil and allow it to drain away slowly.
The project design is in compliance with these strategies. There are no natural areas to preserve
and the project will create more impervious surfaces (landscaping and permeable payers) than
under pre-project conditions. Shared drive aisles will provide access to the units and are being
designed with minimal widths. Minimal parking spaces are proposed within the site.
Runoff from the roofs will flow towards pervious landscape areas, flow-through planters, and
permeable payers, where possible. Flow-through planters have medium to high removal
efficiency for all pollutant categories. A Bio Clean Water Polisher and Curb Inlet Basket will
also be used to treat the additional on-site runoff. Water Polishers have medium to high removal
efficiency for dissolved metals, nutrients, and bacteria (nutrients and bacteria are the primary
pollutants of concern), and also removes large to fine TSS and particulates. Curb Inlet Baskets
contain the BioMediaGREEN media type that provides medium to high level performance for
the pollutants generated in streets such as metals, nutrients, bacteria, oils/grease, and the finest
TSS. The media filters also include two layers of pre-treatment media (coconut coir and a.
polymer fabric). The coconut coir has a very high flow rates and traps large particles. The
polymer fabric removes hydrocarbons and medium-sized TSS. Under the BioMediaGREEN is
BioSorb, which is a high flow rate granule media that also has the capacity to remove any
emulsified hydrocarbon that may get through. It also acts as an underdrain. Removal of trash and
debris is provided by the upper screens on the side of the filter body. BMP sizing is included in
Appendix A of this report.
4.4 Treatment Control BMPs
Treatment control BMPs were selected to treat the project's pollutants of concern identified from
Table 3 and the 303(d) list. Flow-through planters, a Bio Clean Curb Inlet Basket, and a Bio
Clean Water Polisher will be used because they have a medium to high pollutant removal
efficiency for the project's pollutants of concern (nutrients and bacteria & viruses). For treatment
control only, a flow-through planter's surface area must be at least 4 percent of the total area
determined from the Drainage Management Areas (per City SUSMP Table 4-6). In addition, a
Water Polisher and Curb Inlet Basket shall be designed using the SUSMP's flow-based criteria,
which is based on the rational method equation assuming an intensity of 0.2 inches per hour. The
treatment control BMP sizing is included in Appendix A.
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4.5 Hydromodification
The January 14, 2011 SUSMP requires hydromodification (flow control) for priority.
development projects to ensure that post-development peak flows do not exceed pre-
development peak flows. RBF Consulting prepared the approved February 2014, State' Street
Townhomes Preliminary Storm Water Management Plan (Priority Project), Carlsbad, San Diego
County, California. (Preliminary SWMP), for the tentative tract map. The Preliminary SWMP
determined that the, project is not subject to hydromodification because it "is tributary to an
existing City storm drain that discharges directly to Buena Vista Lagoon approximately 350 feet
downstream of the Project Site."
The final engineering design will result in some runoff onto State Street. State Street conveys
storm runoff directly to the lagoon, so the portion of the project runoff that flows onto State
Street is also exempt from hydromodification.
5.0 STORM WATER BMP MAINTENANCE
The developer will be responsible for funding and implementing the operations and maintenance
of the project BMPs. Provisions will be made to transfer operations and maintenance to the new
owner in the event of a change in ownership. The homeowner's association will ultimately be
responsible for ongoing operations and maintenance within common areas, and individual
homeowner's will be responsible for their private property as outlined in the CC&Rs. The
following describes the specific BMP maintenance.
Flow- Through, Planters
The drainage outlet from the flow-through planters shall be inspected monthly and after large
storm events. Debris, sediment, and other obstructions shall be removed immediately from the
outlet. The landscaping shall also be inspected monthly and trimmed, weeded, replanted, or
replaced, as needed, to maintain an appropriate cover. The irrigation system shall be inspected at
least monthly and maintained, as needed
Permeable Payers
Following installation, inspect payers once a month for 4 to 6 months (or in accordance with
manufacturer's recommendations). After this period, inspection can occur semi-annually,
particularly after there has been heavy rain or storms, for this is the time when the drainage voids
can become clogged with organic debris. Sweep (low pressure, washer) and vacuum the
permeable surface 2 to 3 times 'a year. or in accordance with the manufacturer's
recommendations. Street sweepers that have a vacuum and brushes can be used. High pressure
hosing shall be performed after sweeping/vacuuming. Ongoing maintenance will involve
removing trash and debris as well as keeping adjacent landscaping areas maintained and
removing clipping from landscape maintenance activities The pavement structural section and
reservoir layer shall be replaced when needed. This includes removal and replacement of
damaged or destroyed permeable pavement.
Water Polisher
The Water Polisher contains Bio Clean's proprietary media for water treatment The filter's
simplistic rectangular-shaped media cage allows for vertical upward flow through the media.
The up flow maximizes media life by using gravity to maintain the filter's hydraulic conductivity
over longer operating periods. The media is enclosed in a filter media housing that can be easily
removed and replaced from the manhole access hatches. The Water Polisher does not require an
operation plan. The filter media in the cage automatically treats storm runoff as it passes from
the catch basin opening to the filter. The manufacturer recommends media replacement up to
four times a year depending on performance. The service will involve collection and removal of
sediment and debris (litter, leaves, papers, cans, etc.) followed by visual inspection for defects
and illegal dumping. Next, the filter media cage will be removed and replaced with a new unit.
Curb Inlet Basket.
A Curb Inlet Basket will be installed in the inlet within the southerly drive area. Bio Clean
recommends that the media type used is their BioMediaGREEN. This media provides medium to
high level performance for the pollutants generated in streets such as metals, nutrients, bacteria,
oils/grease, and the finest TSS. The media filters also include two layers of pre-treatment media
(coconut coir and a polymer fabric). The coconut coir has a very high flow rates and traps large
particles. The polymer fabric removes hydrocarbons and medium-sized TSS. Under the
BioMediaGREEN isBioSorb, which is a high flow rate granule media that also has the capacity
to remove any emulsified hydrocarbon that may get through. It also acts as an underdrain.
Removal of trash .and debris is provided by the upper screens on the side of the filter body. The
Curb Inlet Basket was designed for easy cleaning and maintenance. "The Easiest Filter to Clean"
- The Bio Clean Curb Inlet Basket with Shelf System makes maintenance quick and easy. Being
the only filter available with this Shelf System, it allows the basket to be positioned directly
under the manhole for easy access for vacuuming.
Landscaping and Private Drainage System
Maintenance will be performed by landscaping personnel. The vegetation will be maintained and
inspected on a monthly basis by landscape maintenance staff and will be replaced or replanted,
as necessary, to maintain a dense, healthy cover. The vegetation will also be inspected after
major storm events. Maintenance shall include periodic mowing, weed control, irrigation,
reseeding/replanting of bare areas, and clearing of debris. A design grass height of 6 inches is
recommended. Grass clippings shall not be left in grass swales. The private drainage system will
shall be kept clear of debris and inspect prior to and during the rainy season to ensure it is free-
flowing.
Efficient Irrigation
The landscaping personnel shall inspect and maintain the irrigation system on a regular basis (at
least monthly). This will occur during the routine maintenance activities. All valves, heads,
shutoff devices, lines, etc. shall be kept in a properly functioning condition. Any defective parts
shall be replaced immediately. The irrigation, system shall be adjusted adjusted to prevent excessive
runoff from landscape areas The irrigation schedule shall be adjusted based on seasonal needs
Inlet Stenciling
Any stenciling shall be inspected at the beginning and end of each rainy season and repaired or.
replaced, as needed. . . . . . . . .
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Hazardous Wastes
Suspected hazardous wastes will be analyzed to determine disposal options. Hazardous materials
are not expected to be generated on-site; however, if discovered, hazardous materials will be
handled and disposed of according to local, state, and federal regulations. A solid or liquid waste
is considered a hazardous waste if it exceeds the criteria listed in the California Code of Federal
Regulations, Title 22, Article 11 (State of California, 1985).
6.0 SUMMARY/CONCLUSIONS
This final SWMP has been prepared in accordance with the City of Carlsbad's January 14, 2011,
Standard Urban Storm Water Management Plan, and has evaluated and addressed potential
pollutants associated with the Rancho Costera project and its effects on water quality. This
SWMP has been based on the final engineering plans by Adams-Streeter. A summary of the facts
and findings associated with the project and the measures addressed by this SWMP .are as
follows:
The beneficial uses for the receiving waters have been identified. BMPs will be used to
protect the beneficial uses as outlined by the SUSMP.
The project will not significantly alter drainage patterns and is not subject to
hydromodification requirements.
A Storm Water Pollution Prevention Plan for construction activities is required to address
construction-related water quality objectives.
Permanent BMPs will be incorporated into the project design in the form of site design,
source control, and LID treatment control.
Details for treatment control BMPs are included in Appendix A.
The proposed BMPs address mitigation measures to protect water quality and beneficial
uses to the maximum extent practicable.
7.0 CERTIFICATION
The selection, sizing, and preliminary design of stormwater treatment and other control measures
in this plan meet the requirements of Regional Water Quality Control Board Order R9-2007-
0001 and subsequent amendments.
4:'.
CITY OF CARLSBAD
STORM WATER
STANDARDS
QUESTIONNAIRE
E-34
Develooment Services
Land Development Engineering
1635 Faraday Avenue
760-602-2750
www.carlsbadca.gov
INSTRUCTIONS: I
To address post-development pollutants that may be generated from development projects, the City requires that new development and
significant redevelopment priority projects incorporate Permanent Storm Water Best Management Practices (BMP's) into the project
design per the City's Standard Urban Stormwater Management Plan (SUSMP). To view the SUSMP, refer to the Engineering Standards
(Volume 4, Chapter 2) at www.carlsbadca.gov/standards.
Initially this questionnaire must be completed by the applicant in advance of submitting for a development application (subdivision,
discretionary permits and/or construction permits). The results of the questionnaire determine the level of storm water standards that
must be applied to a proposed development or redevelopment project. Depending on the outcome, your project will either be subject to
'Standard Stormwater Requirements' or be subject to additional criteria called Priority Development Project Requirements'. Many
aspects of project site design are dependent upon the storm water standards applied to a project.
Your responses to the questionnaire represent an initial assessment of the proposed project conditions and impacts. City staff has
responsibility for making the final assessment after submission of the development application. If staff determines that the questionnaire
was incorrectly filled out and is subject to more stringent storm water standards than initially assessed by you, this will result in the return
of the development application as incomplete. In this case, please make the changes to the questionnaire and resubmit to the City.
If you are unsure about the meaning of a question or need help in determining how to respond to one or more of the questions, please
seek assistance from Land Development Engineering staff.
A separate completed and signed questionnaire must be submitted for each new development application submission. Only one
completed and signed questionnaire is required when multiple development applications for the same project are submitted concurrently.
In addition to this questionnaire, you must also complete, sign and submit a Project Threat Assessment Form with construction permits
for the project.
Please start by completing Step I and follow the instructions. When completed, sign the form at the end and submit this with your
application to the city.
STEP I
TO BE COMPLETED FOR ALL PROJECTS
To determine if your project is a priority development project, please answer the following questions:
YES. NO
Is your project LIMITED TO constructing new or retrofitting paved sidewalks, bicycle lanes or trails that meet
the following criteria: (1) Designed and constructed to direct storm water runoff to adjacent vegetated areas, or
other non-erodible permeable areas; OR (2) designed and constructed to be hydraulically disconnected from
paved streets or roads; OR (3) designed and constructed with permeable pavements or surfaces in
accordance with USEPA Green Streets guidance?
Is your project LIMITED TO retrofitting or redeveloping existing paved alleys, streets, or roads that are x designed and constructed in accordance with the USEPA Green Streets guidance?
If you answered "yes" to one or more of the above questions, then your project is NOT a priority development project and therefore is
NOT subject to the storm water criteria required for priority development projects. Go to step 4, mark the last box stating "my
project does not meet PDP requirements" and complete applicant information.
If you answered "no" to both questions, then go to Step 2.
E-34
STORM WATER
STANDARDS
15 h>
CITY OF QUESTIONNAIRE
CARLSBAD E-34
Development Services
Land Development Engineering
1635 Faraday Avenue
760-602-2750
www.carlsbadca.gov
NO
x
x
x
x
x
x
x
abject to
nts such
,ith your
I of this
subject to
ured for all
Go to step
applicant
ie 6/27/13
As
X'10*
CITY OF
CARLSD/-%D1)
STORM WATER Development Services STANDARDS Land Development Engineering
QUESTIONNAIRE 1635 Faraday Avenue
760-602-2750 E-34 www.carlsbadca.gov
STEP
TO BE COMPLETED FOR REDEVELOPMENT PROJECTS THAT ARE PRIORITY DEVELOPEMENT PROJECTS ONLY
Complete the questions below regarding your redevelopment project: YES NO
Does the redevelopment project result in the creation or replacement of impervious surface in an amount of less than
50% of the surface area of the previously existing development? X
If you answered yes,' the structural BMP's required for Priority Development Projects apply only to the creation or replacement of
impervious surface and not the entire development. Go to step 4, check the "my project meets PDP requirements" box and
complete applicant information.
If you answered no the structural BMP s required for Priority Development Projects apply to the entire development Go to step 4
check the "my project meets PDP requirements" box and complete applicant information.
STEP4
CHECK THE APPROPRIATE BOX AND COMPLETErAPPLICANT INFORMATION
My project meets PRIORITY DEVELOPMENT PROJECT (PDP) requirements and must comply with additional stormwater
criteria per the SUSMP and I understand I must prepare a Storm Water Management Plan for submittal at time of application.
I understand flow control (hydromodification) requirements may apply to my project. Refer to SUSMP for details.
I My project does not meet POP requirements and must only comply with STANDARD STORMWATER REQUIREMENTS per
the SUSMP. As part of these requirements, I will incorporate low impact development strategies throughout my project.
Applicant Information and Signature Box
8105 Irvine Center Dr. Suite 1450 Address: Accessor s Parcel Number(s): Irvine, CA 92618 155-200-07; 203-054-19, 20, 21, 22
Applicant Name: April Tornillo
Applicant Title: Land Project Manager
Applicant Signature: / Date: lo .z1.
This Box for City Use Only
City Concurrence: I YES NO
By:
Date:
Project ID:
Environmentally Sensitive Areas include but are not limited to all Clean Water Act Section 303(d) impaired water bodies; areas
esignated as Areas of Special Biological Significance by the State Water Resources Control Board (Water Quality Control Plan for the
an Diego Basin (1994) and amendments) water bodies designated with the RARE beneficial use by the State Water Resources
ontrol Board (Water Quality Control Plan for the San Diego Basin (1994) and amendments); areas designated as preserves or their
uivalent under the Multi Species Conservation Program within the Cities and County of San Diego and any other equivalent
nvironmentally sensitive areas which have been identified by the Copermittees.
E-34 Page 3 of 3 Effective 6/27/13
u LIP i ' ' 4.8 Miles 2006 5A 2019
Stream 18070303 (Dichlorod iphenyltrichioroethane)
Source Unknown
Nitrate and Nitrite 4.8 Miles 2006 5A 2019
Source Unknown
Phosphate 4.8 Miles 2006 5A 2019
Source Unknown
9 (Mu —en aVistaj River& 90421000 • Sediment Toxicity 11 Miles 2006 5A 2019
(Creek) Stream 18070303 o Unknown Nonpoint Source
Unknown Point Source
Selenium 11 Miles 2008 5A 2019
Source Unknown
9 (Buena Visth) Estuary 90421000 / • Indicator Bacteria 202 Acres 1996 5A 2008
18070303 0 Nonpoint Source
Point Source
Nutrients 202 Acres 1996 5A 2019
Nonpoint Source
Point Source
Estimated size of impairment is 150 acres located in upper portion of lagoon
- euflfleJ1tdLIUI1IIflatiofl
NonpointSource 202 Acres 1996 5A 2019
Point Source
9 Chollas River& 90822000 I • Copper 3.5 Miles 1996 5A 2004
Creek Stream 18070304 0 Nonpoint Source
Point Source
Diazinon 3.5 Miles 2002 5B 2003
0 Nonpoint Source
0 Point Source
Indicator Bacteria 3.5 Miles 2002 5A 2005
Nonpoint Source
.0 Point Source
o Urban RunofflStormSewers . .. ..
Lead 35 Miles 1996 5A 2004
Atmospheric Deposition
0 Landfills
0 Nonpoint Source
Point Source
0 Surface Runoff . .
Urban RunofflStormSewers .
Phosphorus . 3.5 Miles 2008 5A 2019
Source Unknown. . . .
A
SUMMARY
The project is only subject to treatment control BMPs and not hydromodification BMPs. The
proposed treatment control BMPs include flow-through planters as well as a Bio Clean
Environmental Services, Inc.'s (Bio Clean) Curb Inlet Basket and Water Polisher. Flow-through
planters will treat a. portion of the roof runoff from Units 1 through 17 and 24 through 30. Each
of these units will be served by their own individual flow-through planter at the front of each
unit. The roofs are essentially impervious. According to the City of Carlsbad's SUSMP, a flow-
through planter's surface area must cover at least 4 percent of the tributary impervious area.
Table A provides the flow-through planter area and tributary roof area of Units 1 through 17 and
24 through 30 based on information provided by the architect, Withee Malcolm Architects, LLP.
The table shows that each flow-through planter is larger than 4 percent of the tributary roof area,
so each planter is adequately sized for treatment control.
Unit
Number
Unit
Type
Tributary Roof
Area, sf
4% of Roof
Area, sf
Flow-Through
Planter Area, sf
1 B2 319 12.8 58
2 . C 302 12.1 40
3 C 302 . 12.1 31
4 C 302 12.1 31
5 C 302 12.1 23
6 C. 302 12.1 23
7 C 302 12.1 23
8 C 302 12.1 31
9 B2 319 12.8 65
10 B2 319 12.8 65
11 C 302 12.1 31
12 ,. C 302 12.1 20
13 C 302 12.1 20
14 C 302 12.1 23
15 C 302 12.1 23
16 C . 302 12.1 23.
17 B2 319 12.8 49
24 B2 319 12.8 20
25 BI 352 14.1 20
26 BI 352 14.1 24
27 . BI 352 14.1 15
28 BI 352 14.1 35
29 BI. 352 14.1 25
30 B2 319 12.8 33
Table A. Flow-Through Planter Sizing Data
The project proposes aBio Clean Curb Inlet Basket and Water Polisher (see the BMP Plan in the
map pocket). A Water Polisher will treat storm runoff from the majority of the northerly half of
the site and the Curb Inlet Basket will treat runoff from the majority of the southerly half of the
site. The flow-based approach from the SUSMIP is used to size the two BMPs. The flow-based
approach uses the rational method equation to determine the required flow. The rational method•
equation is:
Q = CIA where Q is the treatment control flow rate, cfs
C.is the runoff factor
us the rainfall intensity, inches per hour
A is the tributary area, acres
The runoff factor is determined by categorizing the tributary area into drainage management
areas (DMAs are categorized as roofs, concrete walkways, concrete driveways/curb/gutter,
permeable payers, and landscaping). Each DMA is assigned a runoff factor per the SUSMIP and
the overall weighted average runoff factor is determined for the tributary area. A spreadsheet
containing the weighted-average runoff factor for the north (C=0.68) and south BMPs (C=0.71)
is attached.
The rainfall intensity is assigned a value of 0.2 inches per hour per the SUSMP. The tributary
areas for the north and south water polishers are 1.06 and 0.48 acres, respectively. Based on this
data, the flow-based treatment control flow rates for the Curb Inlet Basket and Water Polisher are
summarized in Table B. The facilities will be sized by Bio Clean based on these flow rates.
BMP C I, in/hr A, ac Q, cfs
Water Polisher (North) 0.68 0.2 1.06 0.14
Curb Inlet Basket (South) 0.71 0.2 0.48 0.07
North Water Polisher
DMA Name DMA Area, sf Post-Project Surface Type Runoff Factor DMA Area x Runoff Factor
Roofs 21,623.4 Impervious 1.0 21,623.4
Concrete Walkways 4,412.2 Impervious 1.0 4,412.2
Concrete Driveways, Curb, Gutter 3,624.3 Impervious 1.0 3,624.3
Permeable Payers 9,267.1 Pervious 0.1 926.7
Landscaping 7,377.6 Pervious 0.1 737.8
Total 46,304.6 31,324.4
0.68 Avg. Runoff Factor
South Grate Inlet Skimmer Box
DMA Name DMA Area, sf Post-Project Surface Type Runoff Factor DMA Area x Runoff Factor
Roofs 10,618.5 Impervious 1.0 10,618.5
Concrete Walkways 893.2 Impervious 1.0 893.2
Concrete Driveways, Curb, Gutter 2,785.2 Impervious 1.0 2,785.2
Permeable Payers 5,254.1 Pervious 0.1 525.4
Landscaping 1,486.9 Pervious 0.1 148.7
Total 21,037.9 14,971.0
0.71 Avg. Runoff Factor
.Advantages .................... .
• 8 Year Warranty
• Works in Any Size Catch Basin
• No Nets or Geofabrics
• 15+ Year User Life
• Meets LEED Requirements
• Patented Shelf System
• Fiberglass Construction
Performance
• 74%-86% Removal ofTSS
.. ?.P.~F..!.~F.~.~!.9.~.~······ ................................................... .. • 54% Removal of Oils & Grease
Model# Treatment
Flow (CFS)
BC-RGISB-22-24 2.4
Operation ...................................................
Bypass Flow
(CFS)
Unlimited
• 57%-71 % Removal of
Phosphorus
• 56%-60% Removal of
Nitrogen
Bypass Flow Path
Treatment Flow Path
£NV/RO-SAFE HIGH CAPACITY ROUND GRATE INLET SKIMMER
BOX SYSTEM FOR USE UNDER MANHOLES
ROUND GISB FOR MOUNTING UNDER MANHOLE
DETAIL OF PARTS
F7GURE 1
FlOW -__, MANHOLE ~·
FIGURE 3
DETAIL OF PROCESS
~'l
\ ..
SH£lF
DRIVE PIN
~!{itr!
Patent Pending. F7GURE 2
DETAIL OF INSTALJ.AnON
FLOW RAT£S ,_. Basket
Q•SO-C~A ,J 2~•h Cd • ,a::::'• .67
so A(ft~) h (ft) Q (~')
TOP SIDE 1 1J5.22 5.50 J.42
C£HTFR SIDE .62 1JO.J6 11.5 2.95
BOTTOM SIOE .56 125.50 17.50 J.17
BOTTOM .68 6J.14 20.81 2.11
TOTAL 11.65
NOTES:
1.SH£LF SYSTEM PROVIDES FOR £N17RE COVERAGE
OF INLET OPENING SO TO DMRT ALL FlOW TO BASKET.
2.SHELF SYSTEM MANUFACTURED FROM MARINE GRADE
F7BERGLASS,GEL COATED FOR lN PROTECnON.
3.SH£LF SYSTEM ATTACHED TO THE CATCH BASIN WITH
NON-CORROSIVE HARDWARE.
4.FTLTRAnON BASKET STRUCTURE MANUFACTURED OF
MARINE GRADE F78£RGL4SS,GEL COATED FOR lN
PROTECnON.
REMOVABLE BASKET CATCHES EVERYTHING
AND MAY BE REMOVED THROUGH MANHOLE
WITHOUT ENTRY.
5.F7LTRAnON BASKET F7NE SCREEN AND COARSE
CONTAINMENT SCREEN MANUFACTURED FROM
STAINLESS STEEL.
6.F7LTRAnON BASKET HOLDS BOOM OF ABSORBENT
MEDIA TO CAPTURE HYDROCARBONS. BOOM IS EASILY
REPLACED WTTHOUT REMOVING MOUNnNG HARDWARE.
7.F7LTRAnON BASKET LOCAnON IS DIRECTLY UNDER
MANHOLE FOR EASY MAINTENANCE. 5 YEAR MANUFACTURERS WARRANTY
PATENTED E:XCLUSIVE: CALIFORNIA DISTRIBUTOR:
BIO CLE:AN E:NVIRONME:NTAL SERVICE:
ALL FILTER SCREENS ARE STAINLESS STEEL
P.O. BOX BB9. OCEANSIDE:. CA. 92049
TEL. 7B0-4.:3.:3-7B40 FAX:7B0-4.:3.:3-.:317B
Erna/I: tnroObtocleanenvtronrnenta/. net
VNTREE 0/JMJTY PROOUCTS AR£ 81.M.T FOR £ASY a£ANING ANO AR£
DfS1GNED TO Bf PfRltWENT NRASTRUCTI/Rf IJIJ SHOWJ
LAST FOR O£CN)[S.
SUNTREE TECHNOLOGIES
79B CLEARLAKE: RO. SUIT£ ,f/2 COCOA FL. :,2922
TE:L. :,21-ts:,7-7!5!52 FAX :,21-ts:,7-7!5!54-
CURB INLET BASKET SYSTEM'-==,,...-----+------
DAT£:: 04/12/04 SCALE:SF -15
DRAFTER: N.R.B. UNITS -INCHES
Curb Inlet Basket
Specifications
Coverage The curb inlet basket provides full coverage of inlets such that all catch basin influent at rated flows is
conveyed to the filter. The filter will retain all windblown and swept debris entering the drain.
Shelf System: The filter basket is located in the catch basin directly beneath a manhole opening for direct
service/access from the manhole.:The filter provides a shelf system made of UV protected marine grade fiberglass
to direct water flow from the curb inlet to the filter, which is located directly under the manhole
Non Corrosive Materials All components of the filter system including mounting hardware fasteners support
brackets, filtration material, and support frame are constructed of non-corrosive materials (316 stainless steel, and
UV/marine grade fiberglass) Fasteners are stainless steel Primary filter mesh is 316 stainless steel welded
screens. Filtration basket screens for coarse, medium and fine filtration is %" x 1 %'expanded, 10 x 10 mesh, and
35 x 35 mesh with optional 50 x 50 mesh and 200 x 200 mesh respectively. No polypropylene monofilament
netting or fabrics shall be used in the products.
Durability: Filter (excluding oil absorbent media) and support structures are of proven durability, with an expected
service life of 10 to 15 years The filter and mounting structures are of sufficient strength to support water,
sediment, and debris loads when the filter is full, with no slippage, breaking, or tearing. All filters are warranted for a
minimum of five (5) years.
Oil Absorbent Media: The Filter is fitted with an absorbent media for removal of petroleum hydrocarbons from
influent and so placed in the filter assembly to treat influent at rated flow. Absorbent media is easily replaceable in
the filter, without the necessity of removing fixed mounting brackets or mounting hardware.
Overflow Protection: The drain filter is designed so that it does not inhibit storm flows entering the curb inlet, or
obstruct flow through the catch basin during peak storm flows.
Filter Bypass: Water will not bypass the filter at low flows, nor bypass through attachment and inlet contact
surfaces at low flows
Pollutant Removal Efficiency: The filter is designed to capture high levels of trash and litter, grass and foliage,
sediments hydrocarbons grease and oil
POLLUTANT Curb Inlet Basket
Trash & Litter 90 to 95%
Oil& Grease 54to96% I
Sediments/TSS 93.54%
Organics 79.3%
Total Nitrogen 65 to 96%
Total Phosphorus 71 to 96%
Non Scouring During heavy storm flows or other flows that bypass the filter, the filter screen design prevents
washout of debris and floatables in the filter basket.
Filter Removal: The filter basket is readily removable from the mounting/support frame for maintenance or
replacement. Removal and replacement of filter screens is accomplished without the necessity of removing
mounting bolts support frames etc.,but by lift out through the manhole
Installation
Installation: The filter will be securely installed in the catch basin or curb inlet opening, with contact surfaces
sufficiently joined together so that no filter bypass can occur at tow flow. All anchoring devices and fasteners are
installed within the interior of the drain inlet The filter basket is located in the catch basin directly beneath a
manhole opening for direct service/access from the manhole. The filter system provides a shelf system to direct
water flow from the inlet to the filter, which is located under the manhole.
Installation Notes:
I Bio Clean Environmental Services Inc notes the Curb Inlet Basket shall be installed pursuant to the
manufacturer's recommendations and the details on this sheet.
2. The patented shelf system shall provide coverage of entire inlet opening, including inlet wing(s) where
applicable to direct all flow to basket(s)
3. Attachments to inlet walls shall be made of non-corrosive hardware.
4. Shelf system shall be installed so that filtration basket is located under manhole access.
5. For the Continuous Curb Inlet Basket(No Shelf System), install bracket under curb opening and hang basket on
bracket
III Maintenance
Maintenance The filter is designed to allow for the use of vacuum removal of captured materials in the filter
basket serviceable by centrifugal compressor vacuum units without causing damage to the filter or any part of the
mounting and attachment hardware during normal cleaning and maintenance Filters can be cleaned and
vacuumed from the manhole-opening. Entering the catch basin to clean the filters is not necessary.
Maintenance Notes:
Bio Clean Environmental Services, Inc. recommends cleaning and maintenance of the Curb Inlet Basket a
minimum of four times per year or following .a significant rain event that would potentially accumulate a large
amount of debris to the system The hydrocarbon boom should be replaced a minimum of twice per year or at
each service as needed
Any person performing maintenance activities that require entering the catch basin or handle a toxic substance
have completed the proper training as required by OSHA.
3 Remove manhole lid to gain access to inlet filter insert The filter basket should be located directly under the
manhole lid. Under normal conditions, cleaning and maintenance of the Curb Inlet Basket will be performed
from above ground surface
4. Special Note: entry into an underground manhole, catch basin and stormwater vault requires training in an
approved Confined Space Entry Program.
5 Remove all trash debris organics and sediments collected by the inlet filter insert Removal of the trash and
debris can be done manually or with the use of a vactor truck. Manual removal of debris maybe done by lifting
the basket from the shelf and pulling the basket from the catch basin and dumping out the collected debris.
6. Any debris located on the shelf system can be either removed from the shelf or can be pushed into the basket
and retrieved from basket
7. Evaluation of the hydrocarbon boom shall be performed at each cleaning. If the boom is filled with
hydrocarbons and oils it should be replaced. Removed boom by cutting plastic ties and remove boom. Attach
new boom to basket with plastic ties through pre drilled holes in basket
8. Place manhole lid back on manhole opening.
9 Transport all debris trash organics and sediments to approved facility for disposal in accordance with local and
state requirements. The hydrocarbon boom with adsorbed hydrocarbons is considered hazardous waste and
need to be handled and disposed of as hazardous material. Please refer to state and local regulations for the.
proper disposal of used motor oil/filters
10 Following maintenance and/or inspection the maintenance operator shall prepare a maintenance/inspection
record The record shall include any maintenance activities performed amount and description of debris
collected and condition of fitter. The owner shall retain the maintenance/inspection record for a minimum of
five years from the date of maintenance These records shall be made available to the governing municipality
for inspection upon request at any time.
11 Any toxic substance or item found in the filter is considered as hazardous material can only be handled by a
certified hazardous waste trained person (minimum 24 hour hazwoper)
B10 .•. .PO Box 869, Oceanside, CA. 92049
(760 433-7640 Fax (760) 433-3176
ENVIRONMENTAL SERVICES. INC. www.biocleanenvironmental.net
Vac Truck Hose
Cleaned Without
Catch Basin Entry
Cleaned Easily
With Vac Tru ck
15 Minute
Service Time
............. Approvals .............. .
••• City and County of County of
Honolulu San Diego
County of
Orange
Meets Full
Capture
Requirements
.... 11-PPl!~~Y~!J ................................................ .
, Parking Lots
, Roadways
2972 San Luis Rey Rd
Oceanside, CA 92058
p 760.433.7640 f 760.433.3176
www.BioCleanEnvironmental.com
CLEAN
AN UP FLOW MEDIA FILTER
CLEAN.
ENVIRONMENTAL SERVICES, INC.
Advantages ............................ .
• Dual-Stage Treatment (Separation & Media Filtration)
, 2 Chambered Separation for Pre-Treatment
, Minimal Fall Requirements
• Easily Installed Online (Internal Bypass)
, Up Flow Technology Minimizes Maintenance
Performance
, 85% Removal ofTSS (SIi-Co-Sii 106)
, 70% Removal of Phosphorus
, 99% Removal of Oils & Grease
, 72% -98% Removal of Copper, Lead & Zinc
• 68% Removal of Bacteria (Fecal Coliform)
.......................................................................... sp.ecifications
Model Number Treatment Sediment Storage
Capacity (cfs) Capacity (cf)
WP-2.5-4-60 0.12 8.37
WP-3-6-72 0.22 25.74
WP-4-6.5-72 0.34 27.74
WP-4-8-84 0.39 47.76
WP-5-10.5-84 0.60 72.20
WP-8-8-96 0.77 90.76
WP-6-12-84 0.94 95.64
WP-8-10-96 1.06 118.52
WP-8-12-96 1.25 161.80
WP-8-14-96 1.45 209.32
Based on 18"0riving Head Sediment Chambers
AN UP FLOW MEDIA FILTER
Up Flow Filter
Sediment Chambers
• Up Flow Filter -Removes fine TSS, metals, nutrients and
bacteria with an advanced sorptive media filtration bed.
• Internal Bypass Weir-Allows for high flow bypass
around the up flow filter for online installations.
Bypass
Once the flow into the system exceeds the capacity of
the up flow filter, the water level rises until it crests over
the top of the internal weir. At this point higher flows are
able to bypass the up flow filter and migrate
directly to the out flow pipe. This internal bypass allows
the system to be placed online. The standard height
of the internal weir is 18'; yet customized heights are
available depending on the hydraulic limitations of your
project.
I nsta 1/ation
····················································································································
•'
.
d
-.
'
..... j _/ ·,•----, -·· ~' 1 ,.
Low Pick Weights
Delivered in a top &
bottom to minimize
weight
1 Hour SetTime
Internal components
are installed prior to
delivery
Minimal Excavation
Bottom of structure less
than 3.5 ft. from invert
of pipe
••• •• . . '
San Diego, CA
Application ..................................................................................................
• Commercial
• Residential
• Retrofit
• Post-treatment for:
-Reuse Systems
-Detention Basins
-Wet Ponds
-Underground Storage
Maintenance ...................................................................................................
• Cleaning can be accessed through
manholes or hatches above ground
with a vac truck
• Separating pollutants minimizes
cost, as sediment and hydrocarbons
are removed prior to entering the up
flow filter chamber
• Up Flow Filter -designed with easy to
open access doors for quick media
replacement. Spent media can be
removed with a vac truck and
replaced by hand. No removal of
expensive and heavy cartridges
DESIGNED FOR USE WITH STANDARD VACUUM TRUCKS
PERFORMANCE SUMMARY
Water Polisher (up flow media filter>
Application: Stand Alone Stormwater Treatment Best Management Practice
Type of Treatment: High Flow Rate Media With Pre-Treatment
DESCRIPTION
The Bio Clean Water Polisher is an advanced dual-stage high flow rate up flow media filter for the treatment of urban stormwater runoff.
Superior pollutant removal efficiencies are achieved by treating runoff through first through a dual-chambered hydrodyanmic separation
to remove TSS and other particulates. A oil skimmer and hydrocarbon booms further pre-treats the water by removing oils and other
hydrocaronbs. Pre-treated runoff is then conveyed to the up flow media filter which contains an engineered ion exchange media called
BioMediaGREEN designed to efficiently remove fine particulates, dissolved metals, nutrients and bacteria.
The Bio Clean Water Polisher is supplied to the job site completely assembled and ready for use. Once installed, stormwater runoff drains
directly from impervious surfaces through an built-in curb inlet, drop in, or via pipe from upstream inlets or downspouts. Treated runoff is
discharged from the system via pipe. The treated water leaving the system is connected to the storm drain system, infiltration basins, or
to be re-used on site for irrigation or other uses.
OILSl<IMMER /INTERN,OL WEIR
BIOSORB HVDROCARBON BOOM
-
TOTAL SUSPENDED SOLIDS
-
Avg. TSS Avg. TSS
Description Type Influent Effluent
(mg/L) (mg/L)
Waves Enviranmen-
fol -1 / 4 Scale Lab Lab 84.6 12.4
Testing -2007
City of Carlsbad Field Field 93 13 Evaulotion -2008
Vernon Recyling
Facility Field Testing Field 3260 78
-2010
City of Los Angeles
-Riverdale Green Field 331 6
Street Testing -2012
Bio Clean Environmental Services, Inc.
2972 San Luis Rey Rd
Removal
Efficiency
85%
86%
98%
98%
PERFORMANCE
OioMedio GREEN"'
Noles
Sil-co-sil 106
-20m<:ron
meonpor·
ticle size
Grob
Samples from Catch
Bo sin
Application
Indus-
triolPemit
Regulations
Tested by
the City
of LA
The BioMediaGREEN has been
independently tested in laboratory and
field conditions since 2008 by both private
consultants and public agencies. With years
of extensive testing and various local and
state BioMediaGREEN is recognized as one
of the most effective systems stormwater
treatment systems available.
HEAVY METALS: Copper
--~~
Avg. Avg. Removal Description Type Influent Effluent Efficiency Notes
(mg/L) (mg/l)
Waves Environmen-DissONed
tal -1 I 4 Scale Lab Lab .57 .12 79% Copper
Testing -2007 Fraction
City of Los Angeles Mean
-Riverdale Green Lab & .0561 .00793 86% Particle Size
Field byCaunt <
Street Testing-2012 BMicrons
CLEAN.
ENVIRONMENTAL SERVICES, INC.
Oceanside, CA 92058 Proven Stormwater Treatment Technology
www.biocleanenvironmental.com
P 760-433-7640
F 760-433-3179
PERFORMANCE SUMMARY
Water Polisher (up flow media filter)
Description Type
Avg.
Influent
(mg/I)
Avg.
Effluent
(mg/I)
Removal
Efficiency Notes
Waves Environmen- Dissolved
tal - 1/4 Scale Lab Lab .75 .16 79% Zinc
Testing - 2007 Fraction
City at Las Angeles Lab & P.
Mean
dicle Si-
- Riverdale Green Field .36 .201 44% by Count I Street Testing -2012 . B Microns
HEAVY METALS Iron
Description Type
Avg.
Influent
(mg/I)
Avg.
Effluent
(mg/I)
Removal
Efficiency Notes
City of Las Angeles Lab &
- Riverdale Green Field 8.02 .447 94% Total Iron
Street Testing -2012
Vernon Recycling
Facility Field Testing Field 70.6 22 69% Total Iron
-2010
Description Type
Avg.
Influent
(mg/I)
Avg.
Effluent
(mg/I)
Removal
Efficiency Notes
Waves Environmen-
tal-1/4 Scale Lab. Lab .39. .19 51% Total
Testing - 2007
City of Las Angeles Lab & TI I
- Riverdale Green Field .00109 .00007 94% Cod°rsorn
Street Testing - 2012
Description Type
Avg.
Influent
(mg/I)
Avg.
Effluent
(mg/I)
Removal
Efficiency Notes
Waves Environmen-
tal - 1/4 Scale Lab Lab .38 .01 . Total Lead
Testing - 2007
City at Las Angeles Lab &
- Riverdale Green Field .0381 .00138 96% Total Lead
Street Testing -2012
Description Type
Avg.
Influent
(mg/I)
Avg.
Effluent
(mg/L)
Removal
til y Notes
Waves Envirartmen-
tal- 1/4 Scale Lab Lab 69.88 6.5 91%
Testing - 2007
City of Las Angeles Lab &
- Riverdale Green Field 20 0 100%
Street Testing -2012
Avg.
Description Type Influent Effluent Efficiency
Avg.
(NTU) (NTU)
Waves Environmen-
tal - 1/4 Scale Lab Lab 36 .32 99%
Testing -2007
Description Type Influent I Effluent I Efficiency Notes
Avg. I Avg. I Removal
(mg/I) I (mg/I)
Waves Environmen-
Testing - 2007
tal - 1/4 Scale Lab Lab 2.07
f
.63 70%
SPECIFIC CONDUCTANCE
I I Avg. Avg. ' Removal I
Description Type Influent Effluent Efficiency Notes
(umho) (umho)
Vernon Recycling
Facility Field Testing Field 9300 3200 66%
-2010
Avg. Avg. Removal Description Type Influent Effluent Efficiency Notes
(mg/I) (mg/I)
Vernon Recycling
Facility Field Testing Field 8200 1300 84%
-2010
Removal m Notes
Sit CLEAN
Bio Clean Environmental Services Inc ENVIRONMENTAL SERVICES INC www.biocleanenvironmental.com
2972 San Luis Rey Rd . P 760-433-7640
Oceanside CA 92058 Proven Stormwater Treatment Technology F 760-433-3179
PERFORMANCE SUMMARY
Water Polisher (up flow media filter)
TOTAL COLIFORMS
Description Type Avg. Influent
(MPN/looml)
Avg. Effluent
(MPN/100ml)
Removal
Efficiency Notes
Waves Environmen-
tal - 1/4 Scale Lab Lab 1600000 875000 45%
Testing -2007
City of Los Angeles Lab &
- Riverdale Green Field 550000 43000 92%
Street Testing -2012
Description Type Avg. Influent
(MpN/looml)
Avg. Effluent
(MPN/OOml)
Removal
Efficiency Notes
Waves Environmen-
tal -1/4Scale Lab Lab 1250000 400000 68%
Testing -2007
Description 1 I Type Avg. Influent
(MPN/loOml)
I Avg. Effluent
(MPN/lOoml)
I Removal
I Efficiency I Notes
City of Los Angeles Lab & f
- Riverdale Green Field 4900 100 98%
Street Testing -2012 I
ENTEROCOCCUS
Description Type Avg. Influent
(MPN/OOml)
Avg. Effluent
(MPN/lOOml)
Removal
Efficiency Notes
City of Los Angeles Lab &
- Riverdale Green Field 1700 860 49%
Street Testing -2012
BI CLEAN
Bio Clean Environmental Services, Inc.. ENVIRONMENTAL .SERVtCES. INC;.www.biocteanenvironmental.com
2972 San Luis Rey Rd P 760-433-7640
Oceanside CA 92058 Proven Stormwater Treatment Technology F 760-433-3179
BAFFLE WALL-_N BioSod, HYDROCARBON BOOM
\ OIL SKIMMER MEDIA
f7t TER HOUSING
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PLAN VIEW
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ACCESS HATCHES
—4-D MINIMUM— CONTRACTOR TO GROUT TO
6— —3'-O— —6 FINISHED GRADE PER
INSTALLATiON NOTE 5
GENERAL NOTES
ALL MATERIALS UNLESS OTHERIWSE
8/0 CLEAN TO PROWDE
ALL DIMENSIONS. LW/A liONS, SPEC/FIC.4 liONS, AND CAPACITIES FI-11 ARE SUBJECT TO CHANGE FOR PROJECT SPECIFIC ORAYNNGS - ---....--- -
DETAILING EXACT DIMENSIONS, WEiGHTS, AND ACCESSORIES - _-T--- -
PLEASE CONTACT BID CLEAN. J ,—STA71C
/WATER
I ELEVATiON
INSTALLATION NOTES I /
CONTRACTOR ID PRO WOE ALL LABOR, EQUIPMENT, LL4JERLILSS, THRU F1OLE—
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UNIT AND APPURTENANCES IN ACCORDANCE TThITHIS DMHTNG INSTALLATION NOTE 5 I IE IN
AND THE MAIVUFAC77JRERS SPECIR04770AS UNLESS OTHERWISE
STATED IN MANUFACTURERS CONTRACT I T
MANUFACTURER RECOMMENDS A MINIMUM 6-12 LEVEL ROCK I
BASE UNLESS SPECIFIED BY THE PROJECT ENGINEER. I I
CONTRACTOR IS RESPONSIBLE TO VERIFY PROJECT ENGINEERS I
RECOMMENDED BASE SPECIFICATIONS. I
J. ALL PIPES MUST BE FLUSH WITH INSIDE SURFACE OF CONCRETE. I I I
(PiPES CANNOT INTRUDE BEYOND FLUSH). L____1..._A.. .....L I CJLW8!RJ2
ALL GAPS AROUND PIPES SHALL BE SEALED WATER liGHT WITH
NON-SHRINK GROUT PER MANUFACTURERS STANDARD *Wow -
CONNECTiON DETAIL AND SHALL MEET OR EXCEED REGIONAL 6 4-8 6
PIPE CONNECTiON STANDARDS.
CONTRACTOR RESPONSIBLE FOR INSTALLATION OF ALL RISERS, 6-0
MANHOLES. AND HATCHES. ALL COVERS SHALL BE SHIPPED 7'-O MINIMUM
LOOSE. CONTRACTOR TO GROUT ALL MANHOLES AND HATCHES
TO MATCH FiNISHED SURFACE UNLESS SPECIFIED OTHERW'SE. END VIEW EL EVA TION VIEW
fITS H PITS
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SITE SPECIFIC DATA *
PROJECT N4ME
PROJECT LOCATION
STRUCTURE ID
WATER QUALITY FLOW RATE (CFS)
PEAK PLOW RATE (Cf5)
PEAK STORM DURATION (YEARS)
PIPE DATA I.E. M4TERL4L DIAMETER
INLET PIPE 1
OUTLET PIPE I
RIM LW/AnON
SURFACE LOAD/NC REQUIREMENT
FRAME AND COVER 024
CORROSIVE SOIL CONDITiONS
KNOWN GROUNDWATER EW/AJION
NOTES:
*PFJ? ENGINEER OF RECORD
WP PERFORMANCE DATA
LTMWMENT FLOW RATE (iqff))
MEDIA SURFACE AREA (SF) g
LOADING RATE (GPM/SF) -
SEDIMENT STORAGE CAPACITY (CF) 22.83
WP STORAGE CAPACITIES
SEDIMENT CHAMBER CAPACITY
LENGTH (PT) WIDTH (17) HEIGHT (PT) TOTAL (CF)
CHAMBER 1 1.00 3.00 2.94 8.82
CHAMBER 2 4.67 3.00 1.00 14.01
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Geotechnical, Inc.
July 14, 2014 Project No. 13200-01
Ms. April Tornillo
Taylor Morrison
8105 Irvine Center Drive, Suite 1450
Irvine, CA 92618
Subject: Payers Design Recommendations for the Proposed State Street Townhomes, 2531 through
2589 State Street, City of Carlsbad, California
References: Brick Industry Association, 2003, Flexible Vehicular Brick Paving, A Heavy Duty
Applications Guide, published January 2003.
LGC Geotechnical, Inc., 2014, Preliminary Geotechnical Evaluation for the Proposed State
Street Townhomes, 2531 through 2589 State Street, City of Carlsbad, California, Project No.
13200-01, dated July 3, 2014.
Introduction
In accordance with your request, LGC Geotechnical, Inc. has prepared this report presenting the
recommended payers design sections for the proposed State Street Townhomes between 2531 and 2589 State
Street, City of Carlsbad, California
Payers Design A design Traffic Index (TI) determined by the project Civil Engineer of 5.0 has been used for the proposed
paver areas. R-Value testing will be performed on finished grade soils at the completion of grading, however,
for these preliminary geotechnical recommendations an R-Value of 15 has been assumed
Concrete payers should be a minimum of 3 and 1/8 inches (80 mm) thick, rated for vehicular traffic.
Manufacturer's specific recommendations regarding the payers (required bedding and jointing sand, etc.)
should be implemented during construction. It should be noted that payers are typically under
layer of bedding sand followed by compacted aggregate base and if necessary, a laye
reinforcement.
Calculations for the design sections resulted in payers sections that are suitable from a
standpoint (Table 1). Concrete payers may be underlain with a 1 to 2 inch layer of bedding sand
minimum of 10 inches of compacted aggregate base over compacted subgrade soils.
Aggregate base must be compacted in thin lifts to a minimum of 95 percent relative compaction of its
maximum density per ASTM D1557. Subgrade soils must be compacted a minimum of 90 percent relative
compaction (A STM D 15 5 7).
TABLE
Calculated Payers Section for Proposed State Street Townhomes
Design Vehicular Payers
Traffic Crushed Aggregate Base
Indices Sand Thickness* (in) (CAB) Thickness ** (in)
5.0 1to2 10.0
* It should be noted that bedding sand layer thickness should be obtained from the Flexible Vehicular Brick
Paving: A Heavy Duty Applications Guide (Brick Industiy Association, 2003).
**Crushed Aggregate Base material shall meet minimum specification of crushed aggregate base (CAB)
per Section 200-2 Untreated Base Materials per latest edition of Greenbook
Concrete bands around the perimeter of the payers are recommended. The concrete bands should be at least 6
inches thick, with two No. 4 rebar placed longitudinally at approximately mid-height. The concrete should be
underlain by a minimum of 4 inches of crushed base material.
The thicknesses above are minimum thicknesses. Increasing the thickness of any or all of the above layers
will reduce the likelihood of the pavement experiencing distress during its service life. The above
recommendations are based on the assumption that proper maintenance and irrigation of the areas adjacent to
the roadway will occur through the design life of the pavement. Failure to maintain a proper maintenance
and/or irrigation program may jeopardize the integrity of the pavement and payers.
Limitations .
Our services were performed using the degree of care and skill ordinarily exercised, under similar
circumstances, by reputable soils engineers and geologists practicing in this or similar localities. No other
warranty, expressed or implied, is made as to the conclusions and professional advice included in this report.
It should be understood that LGC Geotechnical, Inc. has relied on the accuracy of documents, verbal
information, and other material and information provided by you and other associated parties in preparation
of this report. LGC Geotechnica!, Inc. makes no warranties or guarantees as to the accuracy or completeness
of information obtained from or compiled by others.
Project No. 13200-01 Page 2 July 14, 2014
We appreciate this opportunity to be of service. Should you have any questions or concerns regarding this.
letter, please do not hesitate to contact our office.
CO LGC Geoleclinical, Inc. 4c;
821 0.
(r CE IFIED
ENGINEERING
GEOLOGIST
0 NO. 2626
cc: ra
2/29116
Tim Lawson, CEG 1821, GE 2626 \5/
TJL/JTC/kmb
Distribution (3) Addressee (includes 2 wet signed copies)
(1) Adams Streeter Civil Engineers, Inc. (via email)
Attention Mr. Mohammad Abadi
Project No 1320001 Page July 14, 2014
I
--S..-'. ... .
I.- -
- -
TM Eco Dublin
-A-- xce, i t et i- i TLF I Environmental Collection OMMERCIAL—
Beauty, functionality and quality are hallmarks of the Belgard® Commercial
brand, and our Environmental Collection of permeable payers is no
exception. Belgard permeable payers combine the best of Belgard
with innovative stormwater management for a superior product line
that provides sustainable solutions and aesthetically appealing designs.
ADA COMPLIANT LT VEHICULAR-BOMM MECHANICAL INSTALLATION
Eco Dublin TM
Smart-looking style meets
smart science. The classic look
of cut stone and contemporary
materials technology combine in
Eco DublinTM, the latest addition
to Belgard's Environmental Series
of permeable payers.
Benefits of Belgard®
Permeable Paving Stone Systems
On. the US Environmental Protection Agency's (EPA) menu for
structural Low Impact Development (LID) BMPs
..• Can contribute toward several LEED NC-2009 points
Reduces stormwater runoff by up to 100%
Can be used to achieve total maximum daily load (TMDL) limits
for a range of pollutants
Certified SRI colors reduce heat island effect
Can reduce or eliminate the need for traditional drainage and
detention requirements, saving space and money
Can be designed to accommodate all native soil types
50-year design life based on proven field performance
SAMPLE PICP SYSTEM CROSS SECTION
J/dl
Bnlgprd Permeable 9 aggregate Curb/Edge
PAVERS (essenhlal)
--
Restraint
ODen-Graded Base
,
- eo-naaie
1 1,2 Bedding Course :
Min.WTYP. No 2slone P, Orilliribr) It If
k,
Underd,ain Gessyethetics on b000,e and
Il1Iiid0dOoth POOlS1 Old no Sides of open graded base
enlitiratien designs, en, 10,1,1,00 (Oplinnal genestlle Or Pill and p0,1101
In, P11 e,11111,atlon desiglls eelilt,e005 dsslg,,e. ,nandarn,y (eerIe,
- no eolittroiion designs.)
The uoadabthty of specific agynegate end often nosy from regaIn to legion. in coons ntf1e10 it becomes
e0005sany to substitute a stnmtta, size, your project engernur should always be consulted.
37/16"x67/8"x31/8"
(87.78mm x 174.57mm x 80mm)
6 7/8" x 6 7/8" x 3 1/8" . .
(174.57mm x 174.57mm x 80mm)
Large Rectangle
67/8"x101/4"x31/8"
(174.57mm x 261.35mm x 80mm)
Shapes
(AU three shapes come in each bundle.)
F_T--71--
Lni.Li
Mechanical Installation
Laying Pattern
CM nsoupe
8 J
ft ,
Av ev
ev
A / I
L;T<49 ir,S! ;y,iL 474 4
I •J 40100
- -
'• 77 IJ - / / /
4r1_
-
41
VEHICULAR-SOMM
Shape
4 1/2" x 9" x 3 1/8"
(114.3mm x 228.6mm x 80mm)
Joint /Vo,d Fill
lyp.8 89 or
Betgard Permeable 9 aggregate Curb/Edge
PAVE//S too similar) Restraint
l, to Bedding Course
Mi
dd Sos yeth ton on been, and
erOded OttO p 17,11and no .0017 too desigro. no, raqeirs
sides of open graded base i0yi00at teserda 0,011 and pant I
0,0.11 ar,irna,ion designs eot,Ii,ation a stars r, ndaio,y Ii,., to, adofluir or despoil
The osatabitty of sped/ito aggregate oat 01/Art uoay from region to region. In cases 0,/ours A becomes
n0500saey to subs/Vote a oittrdae size, your project engineer o/rce.ed abiaayn be consulted.
Bi—le Running Bond Herringbone 45 Degree
Basket I'I"eatie Herringbone 90 Degree
Laying Patterns
Aqua RocTM
Aqua Roc is a versatile paver featuring
not only the environmentally-friendly
benefits of a permeable paver, but also
high visual appeal, low maintenance.
and proven durability. Aqua Roc's
versatile pattern range allows for
flexible design options, making it
an excellent choice for vehicular use.
Benefits of Belgard®
Permeable Paving Stone Systems
On the US Environmental Protection Agency's (EPA) menu for
structural Low Impact Development (LID) BMPs
Can contribute toward several LEEDNC-2009 points
Reduces stormwater runoff by up to 100%
Can be used to achieve total maximum daily load (TMDL) limits
for a range of pollutants
Certified SRI colors reduce heat island effect
Can reduce or eliminate the need for traditional drainage and
detention requirements, saving space and money
Can be designed to accommodate all native soil types
50-year design life based on proven field performance
SAMPLE PICP SYSTEM CROSS SECTION
I I I I I I I I I
ii
I I I
DMA LEGEND:
DRAINAGE BASIN BOUNDARY
PROPOSED ROOF TO WATER POLISHER/CURB INLET BASKET GRAPHIC SCALE
kV//1 PROPOSED ROOF TO FLOW-THROUGH PLANTER 20 0 10 20 40
PROPOSED ROOF TO PERMEABLE PAVER
1 PROPOSED PERMEABLE PAVER 1 INCH = 20 FEET
PROPOSED CONCRETE WALKWAY
PROPOSED CONCRETE CURB, GUTTER, SWALE
PROPOSED STORM DRAIN
BMP 'TABLE
BMP ID
#1
BMP TYPE SYMBOL =GASQA NO.'{ QUANTITY DRAWING NO. SHEET NO (S)
[_
FREQUENCY
INSPECTION f MAINTENANCE
FREQUENCY
CONSTRUCTION
SIGN OFF
TREATMENT CONTROL
WATER
F 34
C) I EA 484-2A
POLISHER
8, 9 MONTHLY QUARTERLY
CURB INLET I EA 484-2A
BASKET 8, 9 MONTHLY QUARTERLY
MANY
PER PLAN
ROOF DRAIN TO
LANDSCAPING SD-li MANY 484-2A 5, 6,7, 8 SEMI-ANNUALLY SEMI-ANNUALLY
FLOW-THROUGH 0 TC-32 24 EA 484-2A
PLANTER
5, 6, 7, 8 MONTHLY MONTHLY
PARTY RESPONSIBLE FOR MAINTENANCE:
NAME STATE STREET TOWNHOMES CONTACT APRIL TORNILLO
ADDRESS 8105 IRVINE CENTER DR. LOW IMPACT DESIGN (L.I.D.)
MANY
PER PLAN j
T ROOF DRAIN TO IRVINE, _CA_92618
I I SD-Il I MANY LANDSCAPING I 484-2A 1 5, 6,7, 8 1 SEMI-ANNUALLY 1 SEMI-ANNUALLY I
MANY
PER PLAN I LANDSCAPE
& IRRIGATION I I i SD-10 /12 8,865 SF 484-2A 5, 6, 7 MONTHLY MONTHLY
MANY
PER PLAN[ NAME WAYNE W.CHANG
I PERMEABLE SD-20 14,521 SF 484-2A PAVERS
1 5,6,7 SEMI-ANNUALLY
J
SEMI-ANNUALLY I
SOURCE CONTROL
®—® INLET SD-13 2 STENCILING
XXX-XX 8 ANNUALLY AS-NEEDED
INDOOR PEST k\\N SC-41 XXX-XX CONTROL
5, 6, 7 PHONE NO. (858) 692-0760 CERTIFICATION PE 46548, EXP 6/30/15 AS-NEEDED AS-NEEDED
BMP NOTES:
PESTICIDE
USE (OUTDOOR) I I SC-41 XXX-XX 5, 6, 7 AS-NEEDED AS-NEEDED
MANY
PER PLAN
SIDEWALKS ogogo SC-43 5,305 SF THESE BMPS ARE MANDATORY TO BE INSTALLED PER MANUFACTURER'S XXX-XX PARKING
5, , 7
RECOMMENDATIONS OR THESE PLANS.
MONTHLY MONTHLY
NO CHANGES TO THE PROPOSED BMPS ON THIS SHEET WITHOUT PRIOR
APPROVAL FROM THE CITY ENGINEER.
NO SUBSTITUTIONS TO THE MATERIAL OR TYPES OR PLANTING TYPES
WITHOUT PRIOR APPROVAL FROM THE CITY ENGINEER.
WA IMP('TIfl TI-lI PR(1IF('T FOR APPROPRIATE BMP CONSTRUCTION
NO OCCUPANCY WILL BE GRANTED UNTIL THE CITY INSPECTION STAFF
'1
u
co to
Ov 5.1
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42
41.90 TC
HP \ \, \
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39.8 TG
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i4 3918 TC 11
3P77TC - I 39TC O3OTC - 7
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39.56 TC Li
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to to
SWMP NO. XX-XX
MAINTENANCE AGREEMENT DOCUMENT: YESX NO____
RECORDATION NO.
SUITE 1450
PHONE NO. (949) 341-1289
PLAN PREPARED BY:
COMPANY CHANG CONSULTANTS
ADDRESS P.O. BOX 9496
RANCHO SANTA FE
CA,_92067
I I ..---.
FOR
-- -
E OF CARLSBAD SHEETS :!JET]FCITY
ENGINEERING DEPARTMENT 1
SINGLE-SHEET BMP PLAN
STATE STREET TOWNHOMES
RECORD COPY
1/-/'t'-I4
INIllAL DATE
PROJECT NO.
DATE INITIAL
REVISIONS DESCRIPTION
DATE INITIAL DATE INITIAL DRAWING NO.
ENGINEER OF WORK OTHER APPROVAL CITY APPROVAL]L